Telephone latch



Oct. 4, 1927.

J KRIVE TELEPHONE'LATCH Filed 111111.16. 192e Patented Oct. 4, 1927.

UNI'IEA JAMES :xnrvn or s'r.. moms, Missoula.

TELEBHGNE :'LAmcH. f.

rlhis inventionrelates to llatch devices for the dials of dialtelephones. f

, An object'of the invention is to provvide a dial latch under controlofthe yreceiver hooligof a telephone, Whereby the di'al is engaged .andheld againstmanipulation when the hoolris 'held down bythe receiver.

Another object of the invention istoprovide a latch Vconstructed anddesigned to operate automatically to enga-ge and hold the telephone dialagainst manipulation when the receiver is on the hook, andto release thedial so that it may be operated when the receiverr is removed from thehook.

Other objects will appear from the following' description, referencebeing made Ato the accompanying drawing in which Fig. 1 shows one formof the invention in connection with the telephone instrument.

Fig. 2 is a cross sectional View on the line 2 2 of Fig. l.

Y The telephone instrument shown is of the familar dial operative typeand, as is known, comprises a Vrotative dial 1 arranged to besuccessively turned from a starting point b v the hand in the directionof tliearrovv (Fig. 2), and to be returned to its starting point by anactuator not shovvn formingr a part of the dial mechanism. TheseSuccessive operations indicate the exchange and the station desired.

Telephone instruments also include a pivotally supported receiver' hook2 for supporting the receiver 3, such hook extending into the instrumentand being cooperatively related to an actuator, not shown, which raisesthe hook when the receiver is removed to close the circuit and Which ismoved downwardly by the Weight of the hook to open the circuit.

My latch invention for the dial is co-opera tively associated With thehook 2 so that when the hook is held down by the receiver 3 the dial 1is latched against manipulation; and. When the hook 2 rises upon removalof the receiver the latch releases the dial and permits manipulationthereof.

As shown my invention comprises an arm 4t pivoted upon a support 5 andextending to position for engagement with and dissengagement from thedial 1. The specic engaging portion shown comprises a part 6 providedWith one or more ianges 7 arranged to engage in the holes in the dial 1when the receiver is on the hook, though the manner and point ofengagement of the the hook 2 is adjustable and such connection y lmaybe' made'aftpany desired point -along the stem of :tlie'hook `bym'eanfsof a clamping biiacket V9 connected vWith the link andA Vsecuredtofthe`stein of the "hookat the'proper point. Y

In the type of telephone instrument shown the invention may be appliedthereto by providing the support 5 upon an'arm 10 extending from aclamping ring 11 secured to the telephone instrument in suchrelationship as to obtain proper operation of the latch by the hook ofthe instrument. Preferably the free end of the arm 4 operates Within aguide 12 to prevent the latch from being disturbed by strains to Whichit may be subjected.

From the foregoing it is apparent that when the hook 2 is held down bythe receiver 3 the latch device is maintained in latching engagementwithr the dial 1, preventing manipulation of the dial While the receiveris on the hook; and, that When the receiver is yremoved from the hookand the hook rises,

the latch is automatically disengaged from the dial, permitting use andmanipulation of n the dial in the usual Way.

The specific form and arrangement of the parts may be varied Within theWhole range of equivalentsy without departure. from the nature andprinciple of the invention. I do not restrict myself in any unessentialparticulars, but What I claim and desire to secure by Letters Patent isl. The combination with the hook and the dial of a dial telephoneinstrument, of a latch operative into and out of engagement with thedial, and a connection operated by the hook for operating the latch toand from engagement with said dial simultaneously with the operation ofthe hook. n

2. The combination with the hook and dial of a telephone instrument, ofa pivoted',

latch arranged to be swung into and out of engagement with the dial, andconnections operated by the hook for operating the latch to and fromengagement with said dial simultaneously with the operation of the hook.3. The combination with the hook and dial of a -tele hone instrument, ofa pivoted latch arranged) ment with the dial, and connections operatedto be swung into and out of engagelengagement with the dial uponmovement of` the hook to its upper position.

4. The combination with the hook and the perforated dial ofa telephoneinstrument, of a pivoted latch operative to and from enf gagement withthe dial in the operations thereof, and a connection operated by thehook for operating said latch simultaneously with the operation of thehook into engagement with the dial as aforesaid when the hook is movedto its lower position.

5. The combination with the hook and the perforated dial of a telephoneinstrument, of a pivoted latch operative to and from engagement with thedial in the operations thereof, and a connection operated` by the hookfor operating said latch simultaneously with the operation of the hookinto engagement with the dial as aforesaid when the hook is moved to itslower position and out of engagement with the dial when the hook israised.

6. The combination with the hook, the dial and the stand of a telephoneinstrument, of a support detachably connected to the stand, a latchelement pivoted upon said support for movement into and out ofengagement with the dial, and a link connecting said latch with the hookfor moving` saidA latch element to and from engagement with said dialsimultaneously with the operation of the hook.

JAMES KRIV.Y

